On Wednesday, social network X (formerly Twitter) updated its Privacy Policy to indicate that it would allow third-party “collaborators” to train their AI models on X data, unless users opt out. While X owner Elon Musk trained xAI’s Grok AI chatbot on X user data, leading to an investigation by the EU’s lead privacy regulator, the company hadn’t yet amended its policy to indicate its data may also be used by third parties.